2020

• Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Hardware-aided update acceleration in a hybrid Semantic Web database system
  in: The Journal of Supercomputing, 2020, Vol.76, (10), p.7961-7984
  

2018

• Christopher Blochwitz, Julian Wolff, Mladen Berekovic, Dennis Heinrich, Sven Groppe, Jan Moritz Joseph, Thilo Pionteck: Hardware-Accelerated Index Construction for Semantic Web
  in: International Conference on Field-Programmable Technology (FPT), Naha, Okinawa, Japan, 2018
  

2017

• Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Search & Update Optimization of a B+ Tree in a Hardware aided Semantic Web Database System
  in: Proceedings of the 7th International Conference on Emerging Databases (EDB), 2017, Springer, Lecture Notes in Electrical Engineering (LNEE), Vol.461, Runner-Up Paper Award, p.172-182
  
• Stefan Werner, Dennis Heinrich, Thilo Pionteck, Sven Groppe: Semi-static operator graphs for accelerated query execution on FPGAs
  in: Microprocessors and Microsystems, 2017, Vol.53, p.178 - 189
  
• Christopher Blochwitz, Julian Wolff, Jan Moritz Joseph, Stefan Werner, Dennis Heinrich, Sven Groppe, Thilo Pionteck: Hardware-Accelerated Radix-Tree Based String Sorting for Big Data Applications
  in: Architecture of Computing Systems (ARCS 2017) - 30th International Conference, 2017, 3.-6. April, Vienna, Austria, LNCS, Vol.10172, p.47-58
  

2016

• Sven Groppe, Dennis Heinrich, Christopher Blochwitz, Thilo Pionteck: Constructing Large-Scale Semantic Web Indices for the Six RDF Collation Orders
  in: Open Journal of Big Data (OJBD), 2016, Vol.2, (1), p.11-25, ISSN 2365-029X
  
• Stefan Werner, Dennis Heinrich, Sven Groppe, Christopher Blochwitz, Thilo Pionteck: Runtime Adaptive Hybrid Query Engine based on FPGAs
  in: Open Journal of Databases (OJDB), 2016, Vol.3, (1), p.21-41
  :

      @Article{OJDB_2016v3i1n02_Werner,
          author    = {Stefan Werner and Dennis Heinrich and Sven Groppe and Christopher Blochwitz and Thilo Pionteck},
          title     = {Runtime Adaptive Hybrid Query Engine based on FPGAs},
          journal   = {Open Journal of Databases (OJDB)},
          issn      = {2199-3459},
          year      = {2016},
          volume    = {3},
          number    = {1},
          pages     = {21--41},
          url       = {http://www.ronpub.com/publications/OJDB_2016v3i1n02_Werner.pdf},
          publisher = {RonPub},
          bibsource = {RonPub},
          abstract = {This paper presents the fully integrated hardware-accelerated query engine for large-scale datasets in the context of Semantic Web databases. As queries are typically unknown at design time, a static approach is not feasible and not flexible to cover a wide range of queries at system runtime. Therefore, we introduce a runtime reconfigurable accelerator based on a Field Programmable Gate Array (FPGA), which transparently incorporates with the freely available Semantic Web database LUPOSDATE. At system runtime, the proposed approach dynamically generates an optimized hardware accelerator in terms of an FPGA configuration for each individual query and transparently retrieves the query result to be displayed to the user. During hardware-accelerated execution the host supplies triple data to the FPGA and retrieves the results from the FPGA via PCIe interface. The benefits and limitations are evaluated on large-scale synthetic datasets with up to 260 million triples as well as the widely known Billion Triples Challenge.}
      }

2015

• Sven Groppe, Dennis Heinrich, Stefan Werner: Distributed Join Approaches for W3C-Conform SPARQL Endpoints
  in: Open Journal of Semantic Web (OJSW), 2015, Vol.2, (1), p.30-52
  
• Christopher Blochwitz, Jan Moritz Joseph, Thilo Pionteck, Rico Backasch, Stefan Werner, Dennis Heinrich, Sven Groppe: An optimized Radix-Tree for hardware-accelerated index generation for Semantic Web Databases
  in: International Conference on ReConFigurable Computing and FPGAs (ReConFig), 2015, December 7 - 9, Cancun, Mexico
  
• Sven Groppe, Dennis Heinrich, Stefan Werner, Christopher Blochwitz, Thilo Pionteck: PatTrieSort - External String Sorting based on Patricia Tries
  in: Open Journal of Databases (OJDB), 2015, Vol.2, (1), p.36-50
  
• Stefan Werner, Dennis Heinrich, Jannik Piper, Sven Groppe, Rico Backasch, Christopher Blochwitz, Thilo Pionteck: Automated Composition and Execution of Hardware-accelerated Operator Graphs
  in: Proceedings of the 10th International Symposium on Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC 2015), 2015, June 29 - July 1, IEEE, Bremen, Germany
  
• Dennis Heinrich, Stefan Werner, Marc Stelzner, Christopher Blochwitz, Thilo Pionteck, Sven Groppe: Hybrid FPGA Approach for a B+ Tree in a Semantic Web Database System
  in: Proceedings of the 10th International Symposium on Reconfigurable Communication-centric Systems-on-Chip (ReCoSoC 2015), 2015, June 29 - July 1, IEEE, Bremen, Germany
  
• Stefan Werner, Dennis Heinrich, Marc Stelzner, Volker Linnemann, Thilo Pionteck, Sven Groppe: Accelerated join evaluation in Semantic Web databases by using FPGAs
  in: Concurrency and Computation: Practice and Experience, 2015, May 18, Vol.28, (7), p.2031-2051
  

2014

• Sven Groppe, Johannes Blume, Dennis Heinrich, Stefan Werner: A Self-Optimizing Cloud Computing System for Distributed Storage and Processing of Semantic Web Data
  in: Open Journal of Cloud Computing (OJCC), 2014, Vol.1, (2), p.1-14
  
• Sven Groppe, Thomas Kiencke, Stefan Werner, Dennis Heinrich, Marc Stelzner, Le Gruenwald: P-LUPOSDATE: Using Precomputed Bloom Filters to Speed Up SPARQL Processing in the Cloud
  in: Open Journal of Semantic Web (OJSW), 2014, Vol.1, (2), p.25-55
  
• Stefan Werner, Dennis Heinrich, Marc Stelzner, Sven Groppe, Rico Backasch, Thilo Pionteck: Parallel and Pipelined Filter Operator for Hardware-Accelerated Operator Graphs in Semantic Web Databases
  in: Proceedings of the 14th IEEE International Conference on Computer and Information Technology (CIT 2014), 2014, September 11 - 13, IEEE, Xi´an, China, Copyright: IEEE